HERE'S HOW THE PILL WORKS
There are two basic types of pills-combination pills and mini-pills, which both work in the same manner.
Both pills act to prevent the release of an oocyte (egg) from the ovary (ovulation). However, women can and do experience breakthrough ovulation - meaning that an oocyte is released from the ovary, thus making fertilization possible.
Both types of pills also cause the cervical mucus to thicken, making it difficult for the sperm to reach the oocyte. It is possble, though for the spem to break through the mucus and for fertiliztion to occur.Hormonal contraceptives (the pill, the patch, and the vaginal ring) all contain a small amount of man-made estrogen and progestin hormones. These hormones work to inhibit the body's natural cyclical hormones to prevent pregnancy. Pregnancy is prevented by a combination of factors. The hormonal contraceptive usually stops the body from ovulating. Hormonal contraceptives also change the cervical mucus to make it difficult for the sperm to go through the cervix and find an egg.
Hormonal contraceptives can also prevent pregnancy by changing the lining of the womb so it's unlikely the fertilized egg will be implanted.
Scientists have confirmed that at the beginning of the process of fertiliztion, the sperm penetrates the oocyte, creating a new human being, who is completely different from his/her mother.